They're mediocre because they weigh so much but do not provide any additional strength compared to a lighter, more well-designed set. About par for the course, most stock wheels are poorly designed to meet pricepoint.

The 650b version of that wheelset weighed in at 1160 grams for the front wheel and 1360 gram for the rear - 5.5 pounds. I would expect the 700c version to be at least 150 grams heavier.